cabs(3) - Linux manual page (original) (raw)

cabs(3) Library Functions Manual cabs(3)

NAME top

   cabs, cabsf, cabsl - absolute value of a complex number

LIBRARY top

   Math library (_libm_, _-lm_)

SYNOPSIS top

   **#include <complex.h>**

   **double cabs(double complex** _z_**);**
   **float cabsf(float complex** _z_**);**
   **long double cabsl(long double complex** _z_**);**

DESCRIPTION top

   These functions return the absolute value of the complex number _z_.
   The result is a real number.

ATTRIBUTES top

   For an explanation of the terms used in this section, see
   [attributes(7)](../man7/attributes.7.html).
   ┌──────────────────────────────────────┬───────────────┬─────────┐
   │ **Interface** │ **Attribute** │ **Value** │
   ├──────────────────────────────────────┼───────────────┼─────────┤
   │ **cabs**(), **cabsf**(), **cabsl**()             │ Thread safety │ MT-Safe │
   └──────────────────────────────────────┴───────────────┴─────────┘

STANDARDS top

   C11, POSIX.1-2008.

HISTORY top

   glibc 2.1.  C99, POSIX.1-2001.

NOTES top

   The function is actually an alias for _hypot(a, b)_ (or,
   equivalently, _sqrt(a*a + b*b)_).

SEE ALSO top

   [abs(3)](../man3/abs.3.html), [cimag(3)](../man3/cimag.3.html), [hypot(3)](../man3/hypot.3.html), [complex(7)](../man7/complex.7.html)

COLOPHON top

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Linux man-pages 6.10 2024-07-23 cabs(3)

Pages that refer to this page:abs(3), cacosh(3), carg(3), casinh(3), catanh(3), ccos(3), ccosh(3), cexp2(3), cexp(3), cimag(3), clog10(3), clog2(3), clog(3), conj(3), cpow(3), cproj(3), creal(3), csin(3), csinh(3), csqrt(3), ctan(3), ctanh(3), fabs(3), hypot(3), complex(7)